.inner_image_div {
    width: 50%;
    float: left;
    border:50px;
    margin:0 auto
}

.inner_down_div {
    /*text-align: left;*/
    font-family: "Microsoft YaHei UI", sans-serif;
    font-size: large;
    margin:0 auto
}
body{
    width: 400px;
}